Jemma Griffiths (born 18 May 1975, in Penarth, Wales), better known as Jem, is a Welsh singer-songwriter. Her debut album, Finally Woken, includes elements of rock, new wave-styled electronica and trip-hop. Along with electronic producer Guy Sigsworth (Björk, Frou Frou), she wrote the song "Nothing Fails", which was later re-worked by Madonna and appeared on her 2003 American Life album. Her second album Down to Earth was released on 16 September 2008.
Jem was born in Penarth, Wales, a small town near the Welsh capital, Cardiff. Her siblings are Chloe, Yestyn and Georgia. Yestyn is in the band Glass Pear
Although she began singing and writing songs during her time at Stanwell school at age thirteen in Penarth, Wales, she decided to head into law and attended Sussex University. However, she spent less time and energy on studies and focused on being a DJ agent, although she did eventually receive a degree in law. There in Brighton, she spent a lot of time promoting club nights, and helped set up and run the specialist breaks label Marine Parade. She has said she "went to class as little as [she] could without being kicked out".
In November 1999, she assembled a mobile recording studio where she further developed her songwriting and music production skills. During this period, she completed four demos that would eventually set up her career in the music industry. From there, she moved to London where she collaborated with Guy Sigsworth, and then to Brooklyn to work with Ge-Ology (Mos Def, Talib Kweli). In autumn 2002 she met Yoad Nevo, who became her co-producer.